<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>404错误</title>
</head>
<body>
    <h3>您访问的页面不存在，请检查访问路径。</h3>
    <button type="button" onclick="history.go(-1)">后退</button>
</body>
</html>